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. 2015 Jan 7;10:79–94. doi: 10.2147/COPD.S73092

Table 3.

Internal consistency estimates for eDiary items

Cronbach’s coefficient α
Overall mean M1 M2 E
Baseline 0.96 0.96 0.96 0.96
Week 12 0.96 0.95 0.96 0.96
Week 26 0.96 0.95 0.96 0.96

Abbreviations: E, evening since the last assessment; eDiary, electronic patient diary; M1, morning diary: symptoms since awakening; M2, morning diary: symptoms since the last assessment.